In editing, nature sounds such as birds and quacking ducks were subliminally used as a simulated laugh track.
Tom Hefner's animated end credit sequence was hand drawn in pencil and later colored in with colored pencils by his wife, Leah Hefner and Daughter-in-law, Jenny Hefner (the film's director, David Lee Hefner's wife). Truly a family effort.
This dark comedy's light-hearted, animated end credit sequence was inspired by the films that used the technique - a trend that gained popularity in the 1960s with films including: title designer Saul Bass' It's a Mad Mad Mad Mad World (1963), Blake Edwards' The Pink Panther (1963), and title designer, Ronald Searle's Those Magnificent Men in Their Flying Machines or How I Flew from London to Paris in 25 Hours 11 Minutes (1965) and Those Daring Young Men in Their Jaunty Jalopies (1969).